{"product_id":"carrier-c50a803064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A803064","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A803064\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A803064\u003c\/strong\u003e commercial packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, the unit will not respond to any call for heating or cooling, and no safety or staging functions will operate. A failed transformer is often misdiagnosed as a thermostat or control board issue, making this an essential first-check component.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD702 | Factory-matched output tolerance for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for the C50A803064 control circuit. Undersized or off-tolerance generic units can overheat, trip internal thermal protection, or fail to sustain voltage under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before handling. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminal connectors, multimeter. Label all low-voltage wiring before removal to ensure correct reinstallation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed by 3PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A803064\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify primary voltage (120V) and VA rating on your unit's data plate before ordering. If your application involves a 208\/240V primary, do not substitute — contact our parts team for the correct transformer. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909663183219,"sku":"CARRIE-C50A803064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909663215987,"sku":"CARRIE-C50A803064-TRANSFORMER-HT01BD702-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD702_949a1248-d63b-4272-8736-c9496af86201.jpg?v=1782940695","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a803064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}